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bafdb645 GL |
1 | /* |
2 | * PS3 bootwrapper entry. | |
3 | * | |
4 | * Copyright (C) 2007 Sony Computer Entertainment Inc. | |
5 | * Copyright 2007 Sony Corp. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; version 2 of the License. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | #include "ppc_asm.h" | |
22 | ||
24ed8559 GL |
23 | .machine "ppc64" |
24 | ||
bafdb645 GL |
25 | .text |
26 | ||
27 | /* | |
28 | * __system_reset_overlay - The PS3 first stage entry. | |
29 | * | |
5761eaa3 GL |
30 | * The bootwraper build script copies the 512 bytes at symbol |
31 | * __system_reset_overlay to offset 0x100 of the rom image. This symbol | |
32 | * must occupy 512 or less bytes. | |
bafdb645 GL |
33 | * |
34 | * The PS3 has a single processor with two threads. | |
35 | */ | |
36 | ||
37 | .globl __system_reset_overlay | |
38 | __system_reset_overlay: | |
39 | ||
40 | /* Switch to 32-bit mode. */ | |
41 | ||
42 | mfmsr r9 | |
43 | clrldi r9,r9,1 | |
44 | mtmsrd r9 | |
45 | nop | |
46 | ||
47 | /* Get thread number in r3 and branch. */ | |
48 | ||
49 | mfspr r3, 0x88 | |
50 | cntlzw. r3, r3 | |
bafdb645 GL |
51 | beq 1f |
52 | ||
53 | /* Secondary goes to __secondary_hold in kernel. */ | |
54 | ||
55 | li r4, 0x60 | |
56 | mtctr r4 | |
57 | bctr | |
58 | ||
bafdb645 | 59 | 1: |
5761eaa3 GL |
60 | /* Save the value at addr zero for a null pointer write check later. */ |
61 | ||
62 | li r4, 0 | |
63 | lwz r3, 0(r4) | |
64 | ||
65 | /* Primary delays then goes to _zimage_start in wrapper. */ | |
66 | ||
bafdb645 GL |
67 | or 31, 31, 31 /* db16cyc */ |
68 | or 31, 31, 31 /* db16cyc */ | |
69 | ||
70 | lis r4, _zimage_start@ha | |
71 | addi r4, r4, _zimage_start@l | |
72 | mtctr r4 | |
73 | bctr | |
74 | ||
5761eaa3 GL |
75 | . = __system_reset_overlay + 512 |
76 | ||
bafdb645 GL |
77 | /* |
78 | * __system_reset_kernel - Place holder for the kernel reset vector. | |
79 | * | |
5761eaa3 | 80 | * The bootwrapper build script copies 512 bytes from offset 0x100 |
bafdb645 | 81 | * of the rom image to the symbol __system_reset_kernel. At runtime |
5761eaa3 GL |
82 | * the bootwrapper program copies the 512 bytes at __system_reset_kernel |
83 | * to ram address 0x100. This symbol must occupy 512 bytes. | |
bafdb645 GL |
84 | */ |
85 | ||
86 | .globl __system_reset_kernel | |
87 | __system_reset_kernel: | |
88 | ||
5761eaa3 | 89 | . = __system_reset_kernel + 512 |